Police fear 'war on cops'

Officer Roger Castillo's widow Debbie, right, grieves as her sons Anthony, Michael and Bryan sit at her side during the memorial service for Miami-Dade police detectives Roger Castillo and Amanda Haworth at the American Airlines Arena Jan. 24, 2011 in Miami, Florida. Castillo and Haworth were killed last Thursday when they were serving an arrest warrant. Today in St Petersburg, Florida two of that city's police officers were gunned down.

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Sgt. Kim Halburian (right) cries along with other officers during the memorial service for Miami-Dade police officers Roger Castillo and Amanda Haworth at the American Airlines Arena Jan. 24 in Miami, Florida. Miami-Dade Police officers Roger Castillo and Amanda Haworth were killed last Thursday when they were serving an arrest warrant. Today in St Petersburg, Florida two of the city's police officers were gunned down.

In a brutal month for law enforcement officials, two more police officers were killed in the line of duty in Florida on Monday--it was the latest in a stretch of five similar incidents in as many days. NBC's Mark Potter reports.